![]() Refresh the browser to see the latest tweets of the entered companies. Point your browser to and try adding companies with actual Twitter account names. Java -jar target/proxy-server-0.0.1-SNAPSHOT.jar Start the edge service to allow access to the web applications through a single point: cd proxy-server Java -Dserver.port=9001 -jar target/website-application-0.0.1-SNAPSHOT.jarħ. Java -Dserver.port=9201 -jar target/news-application-0.0.1-SNAPSHOT.jar Java -Dserver.port=9401 -jar target/admin-application-0.0.1-SNAPSHOT.jar Java -Dserver.port=9601 -jar target/biz-application-0.0.1-SNAPSHOT.jar Use free terminals to start each of the functional microservices: cd biz-application Java -jar target/config-server-0.0.1-SNAPSHOT.jarĪgain, wait until the application is fully started.Ħ. Run it by executing the following in one of the free terminals: cd config-server It serves as an external source of configuration for the microservices. The second service you need in place before deploying the functional microservices is the config-app. Wait until the application is fully started.ĥ. Java -jar target/discovery-server-0.0.1-SNAPSHOT.jar Run the discovery-server application by executing the following in one of the terminals: cd discovery-server It allows services to discover other services without knowing their exact location (URI). The first service you need to get ready is the discovery-server. Open 7 terminals and move all of them to the vaadin -microservices-demo directory.Ĥ. Compile the project with Maven: cd vaadin-microservices-demoģ. Download the code from GitHub or from the command line with Git: git clone Ģ. The following are the steps to download and run the demo application:ġ. Give it a try and run the application by yourself! All you need is Maven, and 7 terminals like the ones in the previous screenshot. The code for this demo application is published on GitHub. As you can see, each machine is about to run a Java application as an individual process. The machines on the right are the functional microservices. The machines on the left are the orchestration services. Think of each terminal as a separate machine. To get an idea of how this system runs, take a look at the following screenshot: proxy-server: Edge service with dynamic routing.config-server: Externalized configuration.discovery-server: Service registration and discovery.website-application: A portal-like website that renders multiple web applications in a single web page.Īdditionally, the system requires three orchestration services:.news-application: A web user interface to display data (companies’ tweets).admin-application: A web user interface to interact with data (companies).biz-application: A REST API for managing data (companies).The functionality of the demo application is provided through 4 microservices: If you had to develop an application like the one in the previous screenshot, you would most likely go with a monolithic application! ![]() The objective of this series of articles is not to teach you whether microservices suit your needs but how to use concrete techniques and patterns common in microservices architectures. The following is a screenshot of the finished demo application: ![]() In this series of articles, you’ll learn how to implement an application using a microservices architecture in plain Java with Spring for the backend and orchestration services, and Vaadin Framework for the web user interface. Microservices promote continuous delivery, team independence (freedom to select the right tools and processes), quick evolvability, scalability, resilience, and high availability. The sum of them constitutes a whole system. Microservices are single-purpose, loosely coupled applications that can be developed, scaled, and deployed independently.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |